body {
	background-color: burlywood;
	background-size: cover;
	text-align: center;
	font-family: "方正舒体";
	font-size: 50px;
}

a {
	font-size: 14px;
	text-decoration: none;
	outline: 0;
}

.circle,
.ring {
	height: 256px;
	position: relative;
	width: 256px;
}

.circle {
	margin: 100px auto 0 auto;
}

.ring {
	background-color: white;
	border-radius: 50%;
	opacity: 0;
	-webkit-transform-origin: 50% 50%;
	-moz-transform-origin: 50% 50%;
	transform-origin: 50% 50%;
	-webkit-transform: scale(0.1) rotate(-270deg);
	-moz-transform: scale(0.1) rotate(-270deg);
	-transform: scale(0.1) rotate(-270deg);
	-webkit-transition: all 0.4s ease-out;
	-moz-transition: all 0.4s ease-out;
	transition: all 0.4s ease-out;
}

.open .ring {
	opacity: 1;
	-webkit-transform: scale(1) rotate(0);
	-moz-transform: scale(1) rotate(0);
	-transform: scale(1) rotate(0);
}

.center {
	background-color: rgba(255, 255, 255, 1);
	border-radius: 50%;
	border: 2px solid gray;
	bottom: 0;
	color: white;
	height: 80px;
	left: 0;
	line-height: 80px;
	margin: auto;
	position: absolute;
	right: 0;
	text-align: center;
	top: 0;
	width: 80px;
	-webkit-transition: all 0.4s ease-out;
	-moz-transition: all 0.4s ease-out;
	transition: all 0.4s ease-out;
}

.open .center {
	border-color: #aaaaaa;
}
.fa {
  display: inline-block;
  font-family: FontAwesome;
  font-style: normal;
  font-weight: normal;
  line-height: 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
/* makes the font 33% larger relative to the icon container */
.fa-lg {
  font-size: 1.3333333333333333em;
  line-height: 0.75em;
  vertical-align: -15%;
}
.fa-2x {
  font-size: 2em;
}



